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Reports packages whose names are either too short, too long, or do not follow the specified regular expression pattern.
<p><b>Example:</b></p>
<pre><code>
  package io;
</code></pre>
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<p>
  Use the options to specify the minimum and maximum length of the package name
  as well as a regular expression that matches valid package names
  (regular expressions are in standard <code>java.util.regex</code> format).
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